GALWAY, IRELAND - MAY 19:   Prince Charles, Prince Of Wales shakes hands with Sinn Fein president Gerry Adams at the National University of Ireland on May 19, 2015 in Galway, Ireland. The Prince of Wales and Duchess of Cornwall arrived in Ireland today for their four day visit to the Republic and Northern Ireland, the visit has been described by the British Embassy as another important step in promoting peace and reconciliation. (Photo by Adam Gerrard - WPA Pool/Getty Images)